/*
 * Date Format 1.2.3
 * (c) 2007-2009 Steven Levithan <stevenlevithan.com>
 * MIT license
 *
 * Includes enhancements by Scott Trenda <scott.trenda.net>
 * and Kris Kowal <cixar.com/~kris.kowal/>
 *
 * Accepts a date, a mask, or a date and a mask.
 * Returns a formatted version of the given date.
 * The date defaults to the current date/time.
 * The mask defaults to dateFormat.masks.default.
 */

/*
 * http://blog.stevenlevithan.com/archives/date-time-format
 */
var dateFormat = function () {
	var	token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZ]|"[^"]*"|'[^']*'/g,
		timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g,
		timezoneClip = /[^-+\dA-Z]/g,
		pad = function (val, len) {
			val = String(val);
			len = len || 2;
			while (val.length < len) val = "0" + val;
			return val;
		};

	// Regexes and supporting functions are cached through closure
	return function (date, mask, utc) {
		var dF = dateFormat;

		// You can't provide utc if you skip other args (use the "UTC:" mask prefix)
		if (arguments.length == 1 && Object.prototype.toString.call(date) == "[object String]" && !/\d/.test(date)) {
			mask = date;
			date = undefined;
		}

		// Passing date through Date applies Date.parse, if necessary
		date = date ? new Date(date) : new Date;
		if (isNaN(date)) throw SyntaxError("invalid date");

		mask = String(dF.masks[mask] || mask || dF.masks["default"]);

		// Allow setting the utc argument via the mask
		if (mask.slice(0, 4) == "UTC:") {
			mask = mask.slice(4);
			utc = true;
		}

		var	_ = utc ? "getUTC" : "get",
			d = date[_ + "Date"](),
			D = date[_ + "Day"](),
			m = date[_ + "Month"](),
			y = date[_ + "FullYear"](),
			H = date[_ + "Hours"](),
			M = date[_ + "Minutes"](),
			s = date[_ + "Seconds"](),
			L = date[_ + "Milliseconds"](),
			o = utc ? 0 : date.getTimezoneOffset(),
			flags = {
				d:    d,
				dd:   pad(d),
				ddd:  dF.i18n.dayNames[D],
				dddd: dF.i18n.dayNames[D + 7],
				m:    m + 1,
				mm:   pad(m + 1),
				mmm:  dF.i18n.monthNames[m],
				mmmm: dF.i18n.monthNames[m + 12],
				yy:   String(y).slice(2),
				yyyy: y,
				h:    H % 12 || 12,
				hh:   pad(H % 12 || 12),
				H:    H,
				HH:   pad(H),
				M:    M,
				MM:   pad(M),
				s:    s,
				ss:   pad(s),
				l:    pad(L, 3),
				L:    pad(L > 99 ? Math.round(L / 10) : L),
				t:    H < 12 ? "a"  : "p",
				tt:   H < 12 ? "am" : "pm",
				T:    H < 12 ? "A"  : "P",
				TT:   H < 12 ? "AM" : "PM",
				Z:    utc ? "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""),
				o:    (o > 0 ? "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),
				S:    ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10]
			};

		return mask.replace(token, function ($0) {
			return $0 in flags ? flags[$0] : $0.slice(1, $0.length - 1);
		});
	};
}();

// Some common format strings
dateFormat.masks = {
	"default":      "ddd mmm dd yyyy HH:MM:ss",
	shortDate:      "m/d/yy",
	mediumDate:     "mmm d, yyyy",
	longDate:       "mmmm d, yyyy",
	fullDate:       "dddd, mmmm d, yyyy",
	shortTime:      "h:MM TT",
	mediumTime:     "h:MM:ss TT",
	longTime:       "h:MM:ss TT Z",
	isoDate:        "yyyy-mm-dd",
	isoTime:        "HH:MM:ss",
	isoDateTime:    "yyyy-mm-dd'T'HH:MM:ss",
	isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'"
};

// Internationalization strings
dateFormat.i18n = {
	dayNames: [
		"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
		"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
	],
	monthNames: [
		"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
		"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"
	]
};

// For convenience...
Date.prototype.format = function (mask, utc) {
	return dateFormat(this, mask, utc);
};

/* javascript日期格式化函数
 * var d=new Date();
 * console.log(d.toString());    //2011-12-29 11:29:43
 * console.log(d.toString(""));    //2011-12-29 11:29:43
 * console.log(d.toString("yyyy-MM-dd"));    //2011-12-29
 * console.log(d.toString("HH:mm:ss"));    //11:29:43
 * console.log(d.toString("yyyy-MM-dd HH:mm:ss"));    //2011-12-29 11:29:43
 * console.log(d.toString("yyyy年MM月dd日 HH:mm:ss"));    //2011年12月29日 11:29:43
 * console.log(d.toString("yyyy-MM-dd HH:mm:ss fff"));    //2011-12-29 11:29:43 862
 */
Date.prototype.toString =function(format,loc){
	    var time={};
	    time.Year=this.getFullYear();
	    time.TYear=(""+time.Year).substr(2);
	    time.Month=this.getMonth()+1;
	    time.TMonth=time.Month<10?"0"+time.Month:time.Month;
	    time.Day=this.getDate();
	    time.TDay=time.Day<10?"0"+time.Day:time.Day;
	    time.Hour=this.getHours();
	    time.THour=time.Hour<10?"0"+time.Hour:time.Hour;
	    time.hour=time.Hour<13?time.Hour:time.Hour-12;
	    time.Thour=time.hour<10?"0"+time.hour:time.hour;
	    time.Minute=this.getMinutes();
	    time.TMinute=time.Minute<10?"0"+time.Minute:time.Minute;
	    time.Second=this.getSeconds();
	    time.TSecond=time.Second<10?"0"+time.Second:time.Second;
	    time.Millisecond=this.getMilliseconds();
	    time.Week=this.getDay();

	    var MMMArrEn=["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"];
	    var MMMArr=["一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"];
	    var WeekArrEn=["Sun","Mon","Tue","Web","Thu","Fri","Sat"];
	    var WeekArr=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];

	    var oNumber=time.Millisecond/1000;

	    if(format!=undefined && format.replace(/\s/g,"").length>0){
	        if(loc!=undefined && loc =="en"){
	            MMMArr=MMMArrEn.slice(0);
	            WeekArr=WeekArrEn.slice(0);
	        }
	        format=format
	            .replace(/yyyy/ig,time.Year)
	            .replace(/yyy/ig,time.Year)
	            .replace(/yy/ig,time.TYear)
	            .replace(/y/ig,time.TYear)
	            .replace(/MMM/g,MMMArr[time.Month-1])
	            .replace(/MM/g,time.TMonth)
	            .replace(/M/g,time.Month)
	            .replace(/dd/ig,time.TDay)
	            .replace(/d/ig,time.Day)
	            .replace(/HH/g,time.THour)
	            .replace(/H/g,time.Hour)
	            .replace(/hh/g,time.Thour)
	            .replace(/h/g,time.hour)
	            .replace(/mm/g,time.TMinute)
	            .replace(/m/g,time.Minute)
	            .replace(/ss/ig,time.TSecond)
	            .replace(/s/ig,time.Second)
	            .replace(/fff/ig,time.Millisecond)
	            .replace(/ff/ig,oNumber.toFixed(2)*100)
	            .replace(/f/ig,oNumber.toFixed(1)*10)
	            .replace(/EEE/g,WeekArr[time.Week]);
	    }
	    else{
	        format=time.Year+"-"+time.Month+"-"+time.Day+" "+time.Hour+":"+time.Minute+":"+time.Second;
	    }
	    return format;
	}

/*  
将String类型解析为Date类型.  
parseDate('2006-1-1') return new Date(2006,0,1)  
parseDate(' 2006-1-1 ') return new Date(2006,0,1)  
parseDate('2006-1-1 15:14:16') return new Date(2006,0,1,15,14,16)  
parseDate(' 2006-1-1 15:14:16 ') return new Date(2006,0,1,15,14,16);  
parseDate('2006-1-1 15:14:16.254') return new Date(2006,0,1,15,14,16,254)  
parseDate(' 2006-1-1 15:14:16.254 ') return new Date(2006,0,1,15,14,16,254)  
parseDate('不正确的格式') retrun null  
*/  
function parseDate(str){   
   if(typeof str == 'string'){   
	   var results = str.match(/^ *(\d{4})-(\d{1,2})-(\d{1,2}) *$/);
      if(results && results.length>3)   
    	  return  new Date(parseInt(results[1],10),(parseInt(results[2],10) -1),parseInt(results[3],10));    
  
      results = str.match(/^ *(\d{4})-(\d{1,2})-(\d{1,2}) +(\d{1,2}):(\d{1,2}):(\d{1,2}) *$/);   
      if(results && results.length>6)   
    	  return new Date(parseInt(results[1],10),parseInt(results[2],10) -1,parseInt(results[3],10),parseInt(results[4],10),parseInt(results[5],10),parseInt(results[6],10));        
  
      results = str.match(/^ *(\d{4})-(\d{1,2})-(\d{1,2}) +(\d{1,2}):(\d{1,2}):(\d{1,2})\.(\d{1,9}) *$/);   
      if(results && results.length>7)   
    	  return new Date(parseInt(results[1],10),parseInt(results[2],10) -1,parseInt(results[3],10),parseInt(results[4],10),parseInt(results[5],10),parseInt(results[6],10),parseInt(results[7],10));
    }   
    return null;   
}   

/*  
将Date/String类型,解析为String类型.  
传入String类型,则先解析为Date类型  
不正确的Date,返回 ''  
如果时间部分为0,则忽略,只返回日期部分.  
*/  
function formatDate(v){   
    if(typeof v == 'string')
       v = parseDate(v);   
    if(v instanceof Date){   
       var y = v.getFullYear();   
       var m = v.getMonth() + 1;   
       var d = v.getDate();   
       var h = v.getHours();   
       var i = v.getMinutes();   
       var s = v.getSeconds();   
       var ms = v.getMilliseconds();      
       if(ms>0)
           return y + '-' + m + '-' + d + ' ' + h + ':' + i + ':' + s + '.' + ms;   
       if(h>0 || i>0 || s>0) return y + '-' + m + '-' + d + ' ' + h + ':' + i + ':' + s;   
           return y + '-' + m + '-' + d;   
    }   
    return '';   
}   

//js获取当前日期的前一天、一月、一年的日期 
function getYestoday(date){      
  var yesterday_milliseconds=date.getTime()-1000*60*60*24;       
  var yesterday = new Date();       
      yesterday.setTime(yesterday_milliseconds);       
      
  var strYear = yesterday.getFullYear();    
  var strDay = yesterday.getDate();    
  var strMonth = yesterday.getMonth()+1;  
  if(strMonth<10)    
  {    
      strMonth="0"+strMonth;    
  }    
  datastr = strYear+"-"+strMonth+"-"+strDay;  
  return datastr;  
}  
  
//获得上个月在昨天这一天的日期   
function getLastMonthYestdy(date){  
   var daysInMonth = new Array([0],[31],[28],[31],[30],[31],[30],[31],[31],[30],[31],[30],[31]);  
   var strYear = date.getFullYear();    
   var strDay = date.getDate();    
   var strMonth = date.getMonth()+1;  
   if(strYear%4 == 0 && strYear%100 != 0){  
      daysInMonth[2] = 29;  
   }  
   if(strMonth - 1 == 0)  
   {  
      strYear -= 1;  
      strMonth = 12;  
   }  
   else  
   {  
      strMonth -= 1;  
   }  
   strDay = daysInMonth[strMonth] >= strDay ? strDay : daysInMonth[strMonth];  
   if(strMonth<10)    
   {    
      strMonth="0"+strMonth;    
   }  
   if(strDay<10)    
   {    
      strDay="0"+strDay;    
   }  
   datastr = strYear+"-"+strMonth+"-"+strDay;  
   return datastr;  
}  
  
//获得上一年在昨天这一天的日期   
function getLastYearYestdy(date){  
   var strYear = date.getFullYear() - 1;    
   var strDay = date.getDate();    
   var strMonth = date.getMonth()+1;  
   if(strMonth<10)    
   {    
      strMonth="0"+strMonth;    
   }  
   if(strDay<10)    
   {    
      strDay="0"+strDay;    
   }  
   datastr = strYear+"-"+strMonth+"-"+strDay;  
   return datastr;  
}

Date.prototype.formatdt = function(format)
{
var o = {
"M+" : this.getMonth()+1, //month
"d+" : this.getDate(), //day
"h+" : this.getHours(), //hour
"m+" : this.getMinutes(), //minute
"s+" : this.getSeconds(), //second
"q+" : Math.floor((this.getMonth()+3)/3), //quarter
"S" : this.getMilliseconds() //millisecond
}
if(/(y+)/.test(format)) format=format.replace(RegExp.$1,
(this.getFullYear()+"").substr(4 - RegExp.$1.length));
for(var k in o)if(new RegExp("("+ k +")").test(format))
format = format.replace(RegExp.$1,
RegExp.$1.length==1 ? o[k] :
("00"+ o[k]).substr((""+ o[k]).length));
return format;
}
